2019-12-13_REVISION - M1980244 (55)

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STORMWATER MANAGEMENT PLAN NEWMONT CRIPPLE CREEK AND VICTOR GOLD MINING COMPANY Table 2. Monitoring parameters for regenerative releases from EMPs. Parameter Sample Type pH In-situ/Grab Total Suspended Solids Grab/Composite Cadmium, dissolved Grab/Composite Copper, dissolved Grab/Composite Iron, total recoverable Grab/Composite Lead, dissolved Grab/Composite Zinc, dissolved Grab/Composite Samples will be collected between the release point from the lower pond in each pond system and the receiving stream, as appropriate. Grab samples will be collected at a point in time that is partway through the release, or CC&V may collect composite samples, with aliquots collected at approximately evenly spaced intervals throughout the period of flow release from the EMP. The pH will be measured in-situ. CC&V will include details on the release monitoring, if any, in its Annual Report. CC&V will provide the date and duration of the storm event that generated the sampled release, and an estimate of the total volume (in gallons) of the release If a need for stormwater sampling is identified for other reasons, the `Surface and Ground Water Sampling SOP" document should be consulted for recommend sampling methodologies (available in Controlled Documents). For specific analyses, the laboratory completing the characterization should be consulted for sampling technique and preservation requirements. 4.4 Schedules and Procedures 4.4.1 Preventive Maintenance The following preventive maintenance activities are integral to the proper functioning of CC&V's stormwater management system: • Road sump and sediment basin BMPs— Inspect quarterly and after major storm events to ensure adequate basin capacity and properly functioning spillways; excavate sediments to restore capacity as needed. • EMPs—Inspect quarterly and after major storm events to ensure adequate basin capacity; inspect inlets and spillways for erosion or scouring; repair as needed.